Large Eddy Simulation of Film Cooling Flow From an Inclined Cylindrical Jet

[+] Author and Article Information
Mayank Tyagi, Sumanta Acharya

Mechanical Engineering Department, Louisiana State University, Baton Rouge, LA 70803

J. Turbomach 125(4), 734-742 (Dec 01, 2003) (9 pages) doi:10.1115/1.1625397 History: Received December 01, 2002; Revised March 01, 2003; Online December 01, 2003
Copyright © 2003 by ASME
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Grahic Jump Location
Schematic of the computational domain and boundary conditions
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Comparison of predicted and measured (Lavrich and Chiapetta 13) velocities at a blowing ratio M=0.5. (a) Streamwise component of velocity at Z/D=0. (b) Vertical component of velocity at Z/D=0. (c) Spanwise component of velocity at Z/D=0.5.
Grahic Jump Location
Comparison of predicted and measured (Lavrich and Chiapetta 13) velocities at a blowing ratio M=1.0. (a) Streamwise component of velocity at Z/D=0. (b) Vertical component of velocity at Z/D=0. (c) Spanwise component of velocity at Z/D=0.5.
Grahic Jump Location
Comparison of (a) predicted non-dimensional temperature with experimental data of Lavrich and Chiapetta 13 at M=1.0 and (b) predicted centerline film-cooling effectiveness (lines) with experimental data (symbols) of Sinha et al. 14 at M=0.5
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(Color) Components of the instantaneous vorticity field on different projection planes (M=1.0)
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(Color) Details of the flow field in the vicinity of a hairpin vortex (M=1.0)
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(Color) Unsteady dynamics of coherent structures and their influence on wall heat transfer at different time instants (a) t0 (arbitrary), (b) t0+T, (c) t0+2T, (d) T0+3T, and (e) t0 at 4T. The time gap T is equal to 300 time steps (=1.5D/Uj). Arrows are tracking hairpin E from one snapshot to another (M=1.0).
Grahic Jump Location
(Color) Instantaneous non-dimensional temperature field on different projection planes (M=1.0)
Grahic Jump Location
(Color) Details of the “mixing interface” created by the hairpin coherent structure (M=1.0)
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Relative change in geometric properties from their respective mean value over observation period. (a) Surface Area. (b) Average Curvature. (c) Wrinkling. (d) Entrainment across the “mixing interface” versus time (M=1.0).



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